On Sat, 2017-06-24 at 21:00 +0100, Jonathan Cameron wrote:
> On Thu, 22 Jun 2017 13:44:33 +0800
> Zhiyong Tao <zhiyong.tao@xxxxxxxxxxxx> wrote:
>
> > This patch supports auxadc suspend/resume flow.
> > Disable auxadc clk and power in suspend function.
> > Enable axuadc clk and power in resume function.
> >
> > Signed-off-by: Zhiyong Tao <zhiyong.tao@xxxxxxxxxxxx>
> Worth handling the cases where power management is not configured into the
> kernel properly.
>
> So a few minor suggestions. Otherwise looks good to me.
> > ---
> > drivers/iio/adc/mt6577_auxadc.c | 37 +++++++++++++++++++++++++++++++++++++
> > 1 file changed, 37 insertions(+)
> >
> > diff --git a/drivers/iio/adc/mt6577_auxadc.c b/drivers/iio/adc/mt6577_auxadc.c
> > index 2d104c8..2dd7c74 100644
> > --- a/drivers/iio/adc/mt6577_auxadc.c
> > +++ b/drivers/iio/adc/mt6577_auxadc.c
> > @@ -184,6 +184,37 @@ static int mt6577_auxadc_read_raw(struct iio_dev *indio_dev,
> > .read_raw = &mt6577_auxadc_read_raw,
> > };
> >
> > +static int mt6577_auxadc_resume(struct device *dev)
> > +{
> > + struct iio_dev *indio_dev = dev_get_drvdata(dev);
> > + struct mt6577_auxadc_device *adc_dev = iio_priv(indio_dev);
> > + int ret;
> > +
> > + ret = clk_prepare_enable(adc_dev->adc_clk);
> > + if (ret) {
> > + pr_err("failed to enable auxadc clock\n");
> > + return ret;
> > + }
> > +
> > + mt6577_auxadc_mod_reg(adc_dev->reg_base + MT6577_AUXADC_MISC,
> > + MT6577_AUXADC_PDN_EN, 0);
> > + mdelay(MT6577_AUXADC_POWER_READY_MS);
> > +
> > + return 0;
> > +}
> > +
> > +static int mt6577_auxadc_suspend(struct device *dev)
> Mark these __maybe_unused for the CONFIG_PM but not CONFIG_PM_SLEEP case.
==> ok, We will add CONFIG_PM_SLEEP for the suspend/resume case in v2.
thanks!
> > +{
> > + struct iio_dev *indio_dev = dev_get_drvdata(dev);
> > + struct mt6577_auxadc_device *adc_dev = iio_priv(indio_dev);
> > +
> > + mt6577_auxadc_mod_reg(adc_dev->reg_base + MT6577_AUXADC_MISC,
> > + 0, MT6577_AUXADC_PDN_EN);
> > + clk_disable_unprepare(adc_dev->adc_clk);
> > +
> > + return 0;
> > +}
> > +
> > static int mt6577_auxadc_probe(struct platform_device *pdev)
> > {
> > struct mt6577_auxadc_device *adc_dev;
> > @@ -269,6 +300,11 @@ static int mt6577_auxadc_remove(struct platform_device *pdev)
> > return 0;
> > }
> >
> > +static const struct dev_pm_ops mt6577_auxadc_pm_ops = {
> > + .suspend = mt6577_auxadc_suspend,
> > + .resume = mt6577_auxadc_resume,
> > +};
> > +
> Use the SIMPLE_SYSTEM_PM_OPS macro to make these assignments magically go away
> if PM_CONFIG_SLEEP is not defined.
==> ok, We will use SIMPLE_DEV_PM_OPS macro to change it in v2. Thanks.
>> static const struct of_device_id mt6577_auxadc_of_match[] = {
> > { .compatible = "mediatek,mt2701-auxadc", },
> > { .compatible = "mediatek,mt8173-auxadc", },
> > @@ -280,6 +316,7 @@ static int mt6577_auxadc_remove(struct platform_device *pdev)
> > .driver = {
> > .name = "mt6577-auxadc",
> > .of_match_table = mt6577_auxadc_of_match,
> > + .pm = &mt6577_auxadc_pm_ops,
> > },
> > .probe = mt6577_auxadc_probe,
> > .remove = mt6577_auxadc_remove,
>
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